This Power amplifier is equiped with a bipolar transistor,the famous MRF317

As lots of FM amplifier application ,the power transistor is in a C class bias.

All the impedance networks (Input & Output) have been determined by using the software: Mimp.EXE.

A 9 elements low pass filter ensures that we meet at least a 60 dB rejection from the carrier.(RF Simulation with RFSIM99)

The FM amplifier has a 10 dB gain with a 60 to 65% efficiency.

The Input VSWR is around 1.4 and there's no problem to reach the max power in all the FM band..

Amplifier schematic PDF File

 

Price: 165 Euros

Parameter	Value
Output Power	100W
Input Power	10W Max
SWR In	1.4 Max
Harmonic Filtering	<-60dBc
Spurious Emission	<-70dBc
Power Supply	28V
Efficiency	60% Min